Supply voltage: 5V/ 12V (Select One)Current: <100mALoad: 250V 10A AC or 30V 10A DCSize: 50.5mm(L)*38.5mm(W)*18.5(H)Weight: 31gPCB color: blackOptocoupler isolation, good anti-interferenceLow-level pull-in, high-level release. The status indicator is on when it is pulled in, and the status indicator is off when it is released.VCC is the system power supply, and JD_VCC is the relay power supply. Just plug in the jumper cap